package com.atguigu.gulimall.auth.controller;

import com.alibaba.fastjson.TypeReference;
import com.atguigu.common.constant.AuthServerConstant;
import com.atguigu.common.exception.BizCodeEnume;
import com.atguigu.common.utils.R;
import com.atguigu.common.vo.MemberResponseVo;
import com.atguigu.gulimall.auth.feign.MemberFeignService;
import com.atguigu.gulimall.auth.feign.ThirdPartFeignService;
import com.atguigu.gulimall.auth.vo.UserLoginVo;
import com.atguigu.gulimall.auth.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;

    @GetMapping("/login.html")
    public String login(HttpSession session){
        if(session.getAttribute(AuthServerConstant.LOGIN_USER)==null){
            return "login";
        }else {
            return "redirect:http://gulimall.com";
        }
    }

    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone") String phone) {
        //TODO 接口防刷
        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
        if (!StringUtils.isEmpty(redisCode)) {
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                //60秒内不允许再次获取
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }
        //生成验证码
        String code = UUID.randomUUID().toString().substring(0, 5) + "_" + System.currentTimeMillis();
        //redis中存储验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone, code, 5, TimeUnit.MINUTES);
        thirdPartFeignService.sendCode(phone, code.split("_")[0]);

        return R.ok();
    }

    /**
     *  处理注册请求
     *  RedirectAttributes： 模拟重定向携带数据
     *                      利用session原理，将数据存放在session中，取出其中的数据之后就会被删除
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){
        if(result.hasErrors()){
            Map<String, String> errors = result.getFieldErrors().stream()
                    .collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors",errors);
            //跳往注册页面
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        //校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
        if(!StringUtils.isEmpty(s)){
            if(code.equals(s.split("_")[0])){
                //删除验证码
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                //验证通过真正注册
                R regist = memberFeignService.regist(vo);
                if(regist.getCode() == 0){
                    //跳往登录页面
                    return "redirect:http://auth.gulimall.com/login.html";
                }else {
                    Map<String,String> errors = new HashMap<>();
                    errors.put("msg",regist.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else{
                Map<String,String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else{
            Map<String,String> errors = new HashMap<>();
            errors.put("code","验证码错误");
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

    }

    /**
     * 登录
     * @return
     */
    @PostMapping("/login")
    public String login(UserLoginVo vo,RedirectAttributes redirectAttributes,HttpSession session){
        //远程登录

        R login = memberFeignService.login(vo);
        if(login.getCode()==0){
            //登录成功
            MemberResponseVo data = login.getData("data", new TypeReference<MemberResponseVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER,data);
            return "redirect:http://gulimall.com";
        }else {
            //登录失败
            Map<String,String> errors = new HashMap<>();
            errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
            redirectAttributes.addFlashAttribute("errors",errors);
            return "redirect:http://auth.gulimall.com/login.html";
        }

    }

}
